The detector is also claimed to significantly reduce system standby current.
It comes in an HSNT-6 (1.96×2.46×t0.5mm) package.
Overvoltage protection is essential when supplying voltage from a battery through a regulator to MCUs and sensors.
The countermeasure involves detecting irregularities such as overvoltage in the regulator output using a voltage detector, and safely resetting the MCU. However, during this process, the voltage supplied from the regulator to the MCU and sensors continues to rise, potentially exceeding the ECU’s voltage tolerance and creating a risk to system safety and functional safety compliance.
This has been a significant technical trade-off in addressing this challenge. While increasing the detection response speed of the voltage monitoring function can mitigate the safety risk, faster detection response typically increases current consumption, which in turn increases the system’s standby current – a critical concern for engineers working to minimize power consumption.
The S-19116 Series significantly enhances functional safety for automotive applications by delivering improvements in both detection speed and current consumption performance.
Features
1. Fast voltage detection response speed and low current consumption
Achieves both the industry’s fastest detection response time, a 92% reduction compared to industry’s conventional products, and low current consumption of 2.0μA.
Increasing the overvoltage detection response speed makes it so that monitoring of voltage increases occurs quicker, ensuring faster output of detection signals to the microcontroller and thereby improving system safety. The low current consumption of 2.0μA during operation also contributes to lower standby current for the overall system.
2. The ultra-small package contributes to a smaller footprint
Use of the HSNT-6 (1.96 mm×2.46 mm×t0.5 mm) ultra-small automotive package allows for an approximately 20% smaller footprint than conventional products.
3. The SENSE pin to which monitoring voltage is input allows for a wide range of input voltages from -30 V to 45 V
Negative voltage can be applied to the SENSE pin. Because the SENSE pin can be connected upstream of the reverse current protection diode installed each ECU, the product can also be used for applications requiring high-accuracy, direct monitoring of I/G and battery voltage.
4. Automotive application quality
The product undergoes three-temperature tests (low temperature, normal temperature, and high temperature). It is also planned to be made compliant with the AEC-Q100 reliability and quality assessment tests by the AEC (Automotive Electronics Council). PPAP (Production Part Approval Process) compliance is also planned. The product can be used in the severe environments of automobile applications.
Specifications
・Operation voltage range: 3.0 V to 36.0
・Voltage detection range: 8.0 V to 24.0 V
・Detection voltage accuracy: ±1.5% (Ta＝-40℃ to +125℃)
・Hysteresis width: Selectable from 0%, 2.3%, 5%, 9%
・Current consumption during operation: 2.0µA typ.
・Detection response time: 6.8µs max.
・Release delay time: 10ms typ. (CD=3.3 nF)
・Operating temperature: -40 to +125℃
・Packages: SOT-23-5, HSNT-6(2025)
・AEC-Q100 compliant
・PPAP support available
Application Examples
・Automotive applications (engines, transmissions, suspensions, ABS, EV/HEV/PHEV, etc.)
・Automotive battery voltage detection
Key Applications
・DC/DC Converter
・On Board Charger (OBC)
・ADAS Domain Controller
・Battery Management System (BMS)
・Inverter
Product details
https://www.ablic.com/en/semicon/products/automotive/automotive-voltage-detector-reset-ic/s-19116xxxa/
